sweet tooth

noun4

1. •
   A liking for foods that are sweet; a weakness for sweets.

   • He eats a healthy diet most of the time, but has a sweet tooth when it comes to candy.
2. •
   A preference, especially for a kind of food.

   • the python has a sweet tooth for rats and mice and the sweet tooth of this particular snake is on edge for a square meal. — 1913
3. •
   Someone with a liking for sweet foods.
4. •
   An edible fungus of species Hydnum repandum.